#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
 
#define IPSTR "8.129.217.21"
#define PORT 80
#define BUFSIZE 1024
 
int main(int argc, char **argv)
{
	int sockfd, ret, i, h;
	struct sockaddr_in servaddr;
	char str1[4096], str2[4096], buf[BUFSIZE], *str;
	socklen_t len;
	fd_set   t_set1;
	struct timeval  tv;

	if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) 
	{
		printf("创建网络连接失败,本线程即将终止---socket error!\n");
		exit(0);
	}
	else
	{
		printf("创建网络连接成功--socket ok!\n");
	}

	bzero(&servaddr, sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	servaddr.sin_port = htons(PORT);
	if (inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 )
	{
		printf("创建网络连接失败,本线程即将终止--inet_pton error!\n");
		exit(0);
	}
	else
	{
		printf("创建网络连接成功--inet_pton ok!\n");
	}

	if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
	{
		printf("连接到服务器失败,connect error!\n");
		exit(0);
	}
	else
	{
		printf("与远端建立了连接\n");
	}

	//发送数据
	memset(str2, 0, 4096);
	strcat(str2, "{\"aaa\":\"bbb\"}");
	str=(char *)malloc(128);
	len = strlen(str2);
	sprintf(str, "%d", len);

	memset(str1, 0, 4096);
	strcat(str1, "POST /data HTTP/1.1\n");
	strcat(str1, "Host: 8.129.217.21\n");
	strcat(str1, "Content-Type: application/json\n");
	strcat(str1, "Content-Length: ");
	strcat(str1, str);
	strcat(str1, "\n\n");

	strcat(str1, str2);
	strcat(str1, "\r\n\r\n");
	printf("%s\n",str1);

	ret = write(sockfd,str1,strlen(str1));
	if (ret < 0) 
	{
		printf("发送失败！错误代码是%d，错误信息是'%s'\n",errno, strerror(errno));
		exit(0);
	}
	else
	{
		printf("消息发送成功，共发送了%d个字节！\n\n", ret);
	}

	FD_ZERO(&t_set1);
	FD_SET(sockfd, &t_set1);

	while(1)
	{
		sleep(2);
		tv.tv_sec= 0;
		tv.tv_usec= 0;
		h= 0;
		printf("--------------->1");
		h= select(sockfd +1, &t_set1, NULL, NULL, &tv);
		printf("--------------->2");

		//if (h == 0) continue;
		if (h < 0) 
		{
			close(sockfd);
			printf("在读取数据报文时SELECT检测到异常，该异常导致线程终止！\n");
			return -1;
		};

		if (h > 0)
		{
			memset(buf, 0, 4096);
			i= read(sockfd, buf, 4095);
			if (i==0)
			{
				close(sockfd);
				printf("读取数据报文时发现远端关闭，该线程终止！\n");
				return -1;
			}
			printf("%s\n", buf);
		}
	}
	close(sockfd);

	return 0;
}
